MEMOIRS OF THE NATIONAL A.CADEMY OF SCIENCES. 407 



work has been carried out, away from collections of all hut West [ndian corals, has rendered 

 impossible a comparison with other species. 



A complete knowledge of any coral form can be obtained only from a full description of both 

 the polypal ami skeletal parts, such a- has been carried out in a few cases by Fowler, von 1 Leidei . 

 Bourne, and Gardiner. But in the present instance it ha- been deemed advisable to confine the 

 studies wholly to the soft parts; for some time such will remain the most pressing need among 

 workers of the group. 



The main object of the work has been to determine, from an examination of as many coral 

 form- a- possible, the principal facts of morphology within the group, and the illustrations are in 

 the main limited to these. 



"Tlic following is the list of speciea studied. The terminology and orthographj adopted is mainly that of 

 Milne and Edwards and Haime I 1857). The recent papers of Vaughan (1901, 1901a) and Yen-ill I L901 ) have shown 

 that this is in great need of revision. I have added the names suggested by these authors where they differ from 

 those here employed. In the descriptive part of tin- work tin- usual references and synonyms of tin- species are 

 omitted, a- these are sufficiently noticed in the papers mentioned, ami also in thai of ( rregory i 1895 i. 



l&adrepora muricata Linnaeus — forma cervicomis (Lam.); forma prolifera (Lam.); forma palmata (Lam. )=Isopora 



muricata (Linn.) [Vaughan]= Acropora muricata (Linn.) [Yen-ill]. 

 Porites astrxoides Lainarck=Pontai aslreoides Lam. [Vaughan] =Porites astreoides Lam. [Verrill]. 

 Pontes clavaria Lamarck=Porites porites (Pallas) forma cUwaria Lam. [Vaughan] = Porites polymorphs Link [Yerrill]. 

 Porites furcaia Lamarck= Porites porites (Pallas) forma furcaia Lam. [Vaughan]. 

 /■■ i s divfiricata Lesueur = Porites pontes i Pallas) forma divaricata Le Sueur [Vaughan]. 

 Astrangia solitaria Lesueur. 

 PkyUangia americana Milne Edwards & Haime. 

 Cladocora arbuscula < Lesueur). 



OrbieeUa annularis (Ellis A: Solander ) = OrWe«Ha acropora (Linn.) [Vaughan]. 

 Orbicella radiata I Kllis & Solander)=Or&uyHa cavernosa (Linn.) [Verrill]. 



Ua cavi rnosa i Linnaeus). 

 \,./, iKistrnn hi/ndes i Dana). 

 Stephanocomia intersepta (Esper). 

 Fhviafragum i Esper). 

 Dichoccmia stokesi Milne Edwards & Haime. 

 Tsophyllia dipsacea Dana. 



Manicina areolata ( Linnaeus) =Mxandra areolata i Linn.) [Yerrill]. 

 Oolpophyllia gyrosa i Kllis & Solander) =Manicina gyrosa (JEM. & Sol.) [Yen-ill]. 

 Mxandrina labyrinthica (Ellis & Solander) =Platygyra labyrinthica (Le Sueur) [Vaughan] =Mxandra cerebrum (Ell. 



& Sol.) [Verrill]. 

 Diploria labyrinthiformis (Linnaeus) =Mxandra labyrinthiformis (Linn.) [Yerrill]. 

 Pectinia mxandrites > Linna-us \=Mxandrina mxandrites (Linn.) [Vaughan]. 

 Oculina diffusa Lamarck. 

 Siderastrxa radians I Pallas). 

 Siderastrxa siderea (Ellis & Solander). 

 Agaricia fragilis Dana. 

 Agaricia agaricites (Linnaeus). 



